Resilient wheel.



J. G. DAW. RESILIENT WHEEL.

APPLIUATION FILED APR. s, 1909.

Patented Aug.23, 1910.

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J. G. DAW.

RESILIENT WHEEL.

APPLIOAT 10N FILED APB., 6, 1909.

Patented Aug. 23, 1910.

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UNITED STATES PATENT OFFICE.

JAMES GILBERT DAW, 0F WELLFIELD, LLANELLY, ENGLAND.

RESILIENT WHEEL.

To ail whom t may concern:

Be it known that I, Jai-,ins GiLBnRT DAW, a subject of England, residingat lVellfield, Llanelly, in the county of Carmarthen, lWales, England,have invented new and useful Improvements in Resilient Wheels, of whichthe following is a specification.

The object of my invention is to construct non-pneumatic elastic wheelswith which solid tires may be employed.

The nature of my invention will be better understood on reference to theaccom` panying sheet of drawings in' which- Figure 1, Sheet l, is a sideelevation of one of my improved wheels partly in section. Fig. 2, is avertical and diagonal section through the same on the line A, B. Figs.3, and t, Sheet 2, Figs. 5 and 6, Sheet 3), and Figs. 3 and 4 arecorresponding views of a modification.

The same letters refer to similar parts throughout the several views.

I carry out my invention by fastening firmly one or more circular platesof steel or other metal, a, ci, on each side ofa raised flange, 1, onthe boss, b, of the wheel by washer plates, Z22, and bolts, 3. Theseplates, a, ci, act as springs. The flange, b1, it will be seen serves asa distance piece. The rim, c, of the wheel is quite separate from theboss and can be put on or taken off as required. On the inner side(smaller diameter) of the rim I secure a ring, cl, which is V shape insection with the point of the V pointing to the center. This ring whenin position acts as a wedge between the two springs, a, al, composed ofthe circular lates, which are fastened to the aforesaid flange, 1. vWitha wheel constructed as here described it will be seen that when anyunevenness on the road is met with, which shall cause a jerk or jolt,the ring, d, on the rim acting as a wedge between the two springs, c,al, will naturally relieve and soften such olts or erks. In addition tothe foregoing, I iiX two other flat rings, c, e, on to the sides of therim for the purpose of holdingpneumatic joint tubes, j", f, and keepingthem tight against the sides of the circular plates. The purpose ofthese tubes is to prevent the dust from interfering with thelubrication.

g, g, are the lugs for providing independent means of giving motion fromthe axle through the boss, Z9, to the rim of the wheel, so that thespring members shall be free to Specification of Letters Patent.

Application led April 6, 1909.

Patented Aug. 23, 1910. SeriaI No. 488,316.

give out the whole of their elastic effect for the purpose of cushioningand absorbing the shock. m, m, are guides to keep the rim at rightangles with the axle, and L, is the solid india rubber tire.

It will be seen from the foregoing that the wedge part of the rim, d,bears upon the edges of the circular plate springs, a, al, at such anangle that when a jar or jolt takes place the wedge forces the springapart in the bottom, when the weight takes effect thus relieving theshock and the reaction of the springs forces the rim back into itsnormal position.

he pneumatic joint tubes, f, f, are inflated so as to bear against thesprings as shown, so that when the springs are distended or contracted,the section alters according to the pressure and then regain theiroriginal position when the springs have forced back the rim by acting onthe V shaped or wedge sectioned rings.

As a modification of the arrangement herein described, instead of thecircular spring plates, a, al?, being fastened to a raised iange on theboss of the wheel and the ring, d, which acts as a wedge between them,being fastened to the rim of the wheel, I reverse the position of theseparts by securing the wedge circular spring plates, a, al, beingfastened to a raised flange on the rim of the wheel as shown in Figs. 3and 4.

I am aware that wheels have been constructed in which spring action isobtained by means of disks and wedge shaped members. In such wheels,however, the rims have invariably been driven through the medium of thedisk springs which are tightened either directly on to the sides of therims or through the medium of balls, but in either case the respectiveparts have to be tightened to suoli an extent that to give the necessaryresistance frictional or otherwise for the transmission of driving powerthe elastic effect of the springs is materially neutralized, and mywithin described invention is intended to obviate this by causing thesprings to operate directly on the wedge shaped ring without anyinterference in order that they may give out the full extent ofcushioning power.

What I do claim and desire to secure by Letters Patent, is,

1. A resilient wheel comprising a hub and a rim, circular spring platessecured to one of said portions, a V shaped ring secured to the otherportion and fitting between the said plates, and means for driving therim from the hub, said means being independent of the plates. n

2. A resilient wheel comprising a hub and a rim, circular spring platessecuredon each side of the hub, a V shaped ring secured to the innerside of the rim and fitting between the spring plates, and meansindependent of the spring plates for driving the rim from the hub. I

3. A resilient wheel comprising a hub and a rim, circular spring platessecured on each side of the hub, a wedge shaped ring secured on the rirnand having its inclined edges en- JAMES GILBERT DAW.

Witnesses:

TREvoR THOMAS, WILLIAM W. REES.

